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affae2bf WD |
1 | /* |
2 | * (C) Copyright 2001 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include <common.h> | |
25 | #include <mpc8xx.h> | |
26 | #include <linux/byteorder/swab.h> | |
27 | ||
6d0f6bcf | 28 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
affae2bf WD |
29 | |
30 | /*----------------------------------------------------------------------- | |
31 | * Protection Flags: | |
32 | */ | |
33 | #define FLAG_PROTECT_SET 0x01 | |
34 | #define FLAG_PROTECT_CLEAR 0x02 | |
35 | ||
36 | /* Board support for 1 or 2 flash devices */ | |
37 | #undef FLASH_PORT_WIDTH32 | |
38 | #define FLASH_PORT_WIDTH16 | |
39 | ||
40 | #ifdef FLASH_PORT_WIDTH16 | |
41 | #define FLASH_PORT_WIDTH ushort | |
42 | #define FLASH_PORT_WIDTHV vu_short | |
43 | #define SWAP(x) __swab16(x) | |
44 | #else | |
45 | #define FLASH_PORT_WIDTH ulong | |
46 | #define FLASH_PORT_WIDTHV vu_long | |
47 | #define SWAP(x) __swab32(x) | |
48 | #endif | |
49 | ||
50 | #define FPW FLASH_PORT_WIDTH | |
51 | #define FPWV FLASH_PORT_WIDTHV | |
52 | ||
53 | /*----------------------------------------------------------------------- | |
54 | * Functions | |
55 | */ | |
56 | static ulong flash_get_size (FPW *addr, flash_info_t *info); | |
57 | static int write_data (flash_info_t *info, ulong dest, FPW data); | |
58 | static void flash_get_offsets (ulong base, flash_info_t *info); | |
59 | ||
60 | /*----------------------------------------------------------------------- | |
61 | */ | |
62 | ||
63 | unsigned long flash_init (void) | |
64 | { | |
6d0f6bcf | 65 | volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; |
affae2bf WD |
66 | volatile memctl8xx_t *memctl = &immap->im_memctl; |
67 | unsigned long size_b0; | |
68 | int i; | |
69 | ||
70 | /* Init: no FLASHes known */ | |
6d0f6bcf | 71 | for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
affae2bf WD |
72 | flash_info[i].flash_id = FLASH_UNKNOWN; |
73 | } | |
74 | ||
75 | /* Static FLASH Bank configuration here - FIXME XXX */ | |
76 | size_b0 = flash_get_size((FPW *)FLASH_BASE0_PRELIM, &flash_info[0]); | |
77 | ||
78 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { | |
79 | printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", | |
80 | size_b0, size_b0<<20); | |
81 | } | |
82 | ||
83 | /* Remap FLASH according to real size */ | |
6d0f6bcf JCPV |
84 | memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000); |
85 | memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V; | |
affae2bf WD |
86 | |
87 | /* Re-do sizing to get full correct info */ | |
6d0f6bcf | 88 | size_b0 = flash_get_size((FPW *)CONFIG_SYS_FLASH_BASE, &flash_info[0]); |
affae2bf | 89 | |
6d0f6bcf | 90 | flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]); |
affae2bf WD |
91 | |
92 | /* monitor protection ON by default */ | |
93 | (void)flash_protect(FLAG_PROTECT_SET, | |
6d0f6bcf JCPV |
94 | CONFIG_SYS_FLASH_BASE, |
95 | CONFIG_SYS_FLASH_BASE+monitor_flash_len-1, | |
affae2bf WD |
96 | &flash_info[0]); |
97 | ||
98 | flash_info[0].size = size_b0; | |
99 | ||
100 | return (size_b0); | |
101 | } | |
102 | ||
103 | /*----------------------------------------------------------------------- | |
104 | */ | |
105 | static void flash_get_offsets (ulong base, flash_info_t *info) | |
106 | { | |
107 | int i; | |
108 | ||
109 | if (info->flash_id == FLASH_UNKNOWN) { | |
110 | return; | |
111 | } | |
112 | ||
113 | if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { | |
114 | for (i = 0; i < info->sector_count; i++) { | |
115 | info->start[i] = base + (i * 0x00020000); | |
116 | } | |
117 | } | |
118 | } | |
119 | ||
120 | /*----------------------------------------------------------------------- | |
121 | */ | |
122 | void flash_print_info (flash_info_t *info) | |
123 | { | |
124 | int i; | |
125 | ||
126 | if (info->flash_id == FLASH_UNKNOWN) { | |
127 | printf ("missing or unknown FLASH type\n"); | |
128 | return; | |
129 | } | |
130 | ||
131 | switch (info->flash_id & FLASH_VENDMASK) { | |
132 | case FLASH_MAN_INTEL: printf ("INTEL "); break; | |
133 | default: printf ("Unknown Vendor "); break; | |
134 | } | |
135 | ||
136 | switch (info->flash_id & FLASH_TYPEMASK) { | |
137 | case FLASH_28F640J5 : | |
138 | printf ("28F640J5 \n"); break; | |
139 | default: printf ("Unknown Chip Type=0x%lXh\n", | |
140 | info->flash_id & FLASH_TYPEMASK); break; | |
141 | } | |
142 | ||
143 | printf (" Size: %ld MB in %d Sectors\n", | |
144 | info->size >> 20, info->sector_count); | |
145 | ||
146 | printf (" Sector Start Addresses:"); | |
147 | for (i=0; i<info->sector_count; ++i) { | |
148 | if ((i % 5) == 0) | |
149 | printf ("\n "); | |
150 | printf (" %08lX%s", | |
151 | info->start[i], | |
152 | info->protect[i] ? " (RO)" : " " | |
153 | ); | |
154 | } | |
155 | printf ("\n"); | |
156 | } | |
157 | ||
158 | /*----------------------------------------------------------------------- | |
159 | */ | |
160 | ||
161 | ||
162 | /*----------------------------------------------------------------------- | |
163 | */ | |
164 | ||
165 | /* | |
166 | * The following code cannot be run from FLASH! | |
167 | */ | |
168 | ||
169 | static ulong flash_get_size (FPW *addr, flash_info_t *info) | |
170 | { | |
171 | FPW value; | |
172 | ||
173 | /* Write auto select command: read Manufacturer ID */ | |
174 | addr[0x5555] = (FPW)0xAA00AA00; | |
175 | addr[0x2AAA] = (FPW)0x55005500; | |
176 | addr[0x5555] = (FPW)0x90009000; | |
177 | ||
178 | value = SWAP(addr[0]); | |
179 | ||
180 | switch (value) { | |
181 | case (FPW)INTEL_MANUFACT: | |
182 | info->flash_id = FLASH_MAN_INTEL; | |
183 | break; | |
184 | default: | |
185 | info->flash_id = FLASH_UNKNOWN; | |
186 | info->sector_count = 0; | |
187 | info->size = 0; | |
188 | addr[0] = (FPW)0xFF00FF00; /* restore read mode */ | |
189 | return (0); /* no or unknown flash */ | |
190 | } | |
191 | ||
192 | value = SWAP(addr[1]); /* device ID no swap !*/ | |
193 | ||
194 | switch (value) { | |
195 | case (FPW)INTEL_ID_28F640J5 : | |
8bde7f77 WD |
196 | info->flash_id += FLASH_28F640J5 ; |
197 | info->sector_count = 64; | |
198 | info->size = 0x00800000; | |
199 | break; /* => 8 MB */ | |
affae2bf | 200 | |
8bde7f77 WD |
201 | default: |
202 | info->flash_id = FLASH_UNKNOWN; | |
affae2bf WD |
203 | break; |
204 | } | |
205 | ||
6d0f6bcf | 206 | if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) { |
affae2bf | 207 | printf ("** ERROR: sector count %d > max (%d) **\n", |
6d0f6bcf JCPV |
208 | info->sector_count, CONFIG_SYS_MAX_FLASH_SECT); |
209 | info->sector_count = CONFIG_SYS_MAX_FLASH_SECT; | |
affae2bf WD |
210 | } |
211 | ||
212 | addr[0] = (FPW)0xFF00FF00; /* restore read mode */ | |
213 | ||
214 | return (info->size); | |
215 | } | |
216 | ||
217 | ||
218 | /*----------------------------------------------------------------------- | |
219 | */ | |
220 | ||
221 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
222 | { | |
223 | int flag, prot, sect; | |
224 | ulong type, start, now, last; | |
225 | int rc = 0; | |
226 | ||
227 | if ((s_first < 0) || (s_first > s_last)) { | |
228 | if (info->flash_id == FLASH_UNKNOWN) { | |
229 | printf ("- missing\n"); | |
230 | } else { | |
231 | printf ("- no sectors to erase\n"); | |
232 | } | |
233 | return 1; | |
234 | } | |
235 | ||
236 | type = (info->flash_id & FLASH_VENDMASK); | |
237 | if ((type != FLASH_MAN_INTEL)) { | |
238 | printf ("Can't erase unknown flash type %08lx - aborted\n", | |
239 | info->flash_id); | |
240 | return 1; | |
241 | } | |
242 | ||
243 | prot = 0; | |
244 | for (sect=s_first; sect<=s_last; ++sect) { | |
245 | if (info->protect[sect]) { | |
246 | prot++; | |
247 | } | |
248 | } | |
249 | ||
250 | if (prot) { | |
251 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
252 | prot); | |
253 | } else { | |
254 | printf ("\n"); | |
255 | } | |
256 | ||
257 | start = get_timer (0); | |
258 | last = start; | |
259 | /* Start erase on unprotected sectors */ | |
260 | for (sect = s_first; sect<=s_last; sect++) { | |
261 | if (info->protect[sect] == 0) { /* not protected */ | |
262 | FPWV *addr = (FPWV *)(info->start[sect]); | |
263 | FPW status; | |
264 | ||
265 | /* Disable interrupts which might cause a timeout here */ | |
266 | flag = disable_interrupts(); | |
267 | ||
268 | *addr = (FPW)0x50005000; /* clear status register */ | |
269 | *addr = (FPW)0x20002000; /* erase setup */ | |
270 | *addr = (FPW)0xD000D000; /* erase confirm */ | |
271 | ||
272 | /* re-enable interrupts if necessary */ | |
273 | if (flag) | |
274 | enable_interrupts(); | |
275 | ||
276 | /* wait at least 80us - let's wait 1 ms */ | |
277 | udelay (1000); | |
278 | ||
279 | while (((status = SWAP(*addr)) & (FPW)0x00800080) != (FPW)0x00800080) { | |
6d0f6bcf | 280 | if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
affae2bf WD |
281 | printf ("Timeout\n"); |
282 | *addr = (FPW)0xB000B000; /* suspend erase */ | |
283 | *addr = (FPW)0xFF00FF00; /* reset to read mode */ | |
284 | rc = 1; | |
285 | break; | |
286 | } | |
287 | ||
288 | /* show that we're waiting */ | |
289 | if ((now - last) > 1000) { /* every second */ | |
290 | putc ('.'); | |
291 | last = now; | |
292 | } | |
293 | } | |
294 | ||
295 | *addr = (FPW)0xFF00FF00; /* reset to read mode */ | |
296 | printf (" done\n"); | |
297 | } | |
298 | } | |
299 | return rc; | |
300 | } | |
301 | ||
302 | /*----------------------------------------------------------------------- | |
303 | * Copy memory to flash, returns: | |
304 | * 0 - OK | |
305 | * 1 - write timeout | |
306 | * 2 - Flash not erased | |
307 | * 4 - Flash not identified | |
308 | */ | |
309 | ||
310 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
311 | { | |
312 | ulong cp, wp; | |
313 | FPW data; | |
314 | int count, i, l, rc, port_width; | |
315 | ||
316 | if (info->flash_id == FLASH_UNKNOWN) { | |
317 | return 4; | |
318 | } | |
319 | /* get lower word aligned address */ | |
320 | #ifdef FLASH_PORT_WIDTH16 | |
321 | wp = (addr & ~1); | |
322 | port_width = 2; | |
323 | #else | |
324 | wp = (addr & ~3); | |
325 | port_width = 4; | |
326 | #endif | |
327 | ||
328 | /* | |
329 | * handle unaligned start bytes | |
330 | */ | |
331 | if ((l = addr - wp) != 0) { | |
332 | data = 0; | |
333 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
334 | data = (data << 8) | (*(uchar *)cp); | |
335 | } | |
336 | for (; i<port_width && cnt>0; ++i) { | |
337 | data = (data << 8) | *src++; | |
338 | --cnt; | |
339 | ++cp; | |
340 | } | |
341 | for (; cnt==0 && i<port_width; ++i, ++cp) { | |
342 | data = (data << 8) | (*(uchar *)cp); | |
343 | } | |
344 | ||
345 | if ((rc = write_data(info, wp, data)) != 0) { | |
346 | return (rc); | |
347 | } | |
348 | wp += port_width; | |
349 | } | |
350 | ||
351 | /* | |
352 | * handle word aligned part | |
353 | */ | |
354 | count = 0; | |
355 | while (cnt >= port_width) { | |
356 | data = 0; | |
357 | for (i=0; i<port_width; ++i) { | |
358 | data = (data << 8) | *src++; | |
359 | } | |
360 | if ((rc = write_data(info, wp, data)) != 0) { | |
361 | return (rc); | |
362 | } | |
363 | wp += port_width; | |
364 | cnt -= port_width; | |
365 | if ((wp & 0xfff) == 0) | |
366 | { | |
367 | printf("%08lX",wp); | |
368 | printf("\x1b[8D"); | |
369 | } | |
370 | } | |
371 | ||
372 | if (cnt == 0) { | |
373 | return (0); | |
374 | } | |
375 | ||
376 | /* | |
377 | * handle unaligned tail bytes | |
378 | */ | |
379 | data = 0; | |
380 | for (i=0, cp=wp; i<port_width && cnt>0; ++i, ++cp) { | |
381 | data = (data << 8) | *src++; | |
382 | --cnt; | |
383 | } | |
384 | for (; i<port_width; ++i, ++cp) { | |
385 | data = (data << 8) | (*(uchar *)cp); | |
386 | } | |
387 | ||
388 | return (write_data(info, wp, data)); | |
389 | } | |
390 | ||
391 | /*----------------------------------------------------------------------- | |
392 | * Write a word or halfword to Flash, returns: | |
393 | * 0 - OK | |
394 | * 1 - write timeout | |
395 | * 2 - Flash not erased | |
396 | */ | |
397 | static int write_data (flash_info_t *info, ulong dest, FPW data) | |
398 | { | |
399 | FPWV *addr = (FPWV *)dest; | |
400 | ulong status; | |
401 | ulong start; | |
402 | int flag; | |
403 | ||
404 | /* Check if Flash is (sufficiently) erased */ | |
405 | if ((*addr & data) != data) { | |
406 | printf("not erased at %08lx (%x)\n",(ulong)addr,*addr); | |
407 | return (2); | |
408 | } | |
409 | /* Disable interrupts which might cause a timeout here */ | |
410 | flag = disable_interrupts(); | |
411 | ||
412 | *addr = (FPW)0x40004000; /* write setup */ | |
413 | *addr = data; | |
414 | ||
415 | /* re-enable interrupts if necessary */ | |
416 | if (flag) | |
417 | enable_interrupts(); | |
418 | ||
419 | start = get_timer (0); | |
420 | ||
421 | while (((status = SWAP(*addr)) & (FPW)0x00800080) != (FPW)0x00800080) { | |
6d0f6bcf | 422 | if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
affae2bf WD |
423 | *addr = (FPW)0xFF00FF00; /* restore read mode */ |
424 | return (1); | |
425 | } | |
426 | } | |
427 | ||
428 | *addr = (FPW)0xFF00FF00; /* restore read mode */ | |
429 | ||
430 | return (0); | |
431 | } |